I agree that the potential of a modern website is bigger than that of a PDF. The problem is that the effort to get there is much much MUCH bigger than with a P

I agree that the potential of a modern website is bigger than that of a PDF. The problem is that the effort to get there is much much MUCH bigger than with a PDF. A PDF has the advantage that it gives the reader a high quality product, consistently. I love reading PDFs on a large iPad. As a reader, these are my highest priorities: * high quality (proper layout & design, high resolution of graphics and text) * easy to store in my library, so I can read it again whenever I want to PDF does that. A modern website acceptable to me needs to do that at least as well as PDF does. And they usually don't. For example, how would I store that website easily in my library, being sure that it doesn't depend on some weird JS library downloaded from an obsolete Cloudflare link? The ePub standard is supposed to deliver that, but it falls short in practice. Whenever there is both an ePub version of something, and a PDF version, I choose the PDF version, because it is just easier and more pleasant to read. An exception are books consisting of purely text like novels, which is where I prefer ePubs.